Design of Full-Ocean-Depth Self-Floating Sampler and Analysis of Factors Affecting Core Penetration Depth  

作　　者：REN Yugang LIU Yanjun DING Zhongjun LIU Baohua ZHANG Jianhua 

机构地区：[1]School of Mechanical Engineering,Shandong University,Jinan 250061,China [2]National Deep Sea Center,Qingdao 266237,China [3]Institute of Marine Science and Technology,Shandong University,Qingdao 266237,China [4]Science and Technology on Underwater Vehicle Laboratory,Harbin Engineering University,Harbin 150001,China

出　　处：《Journal of Ocean University of China》2020年第5期1094-1102,共9页中国海洋大学学报（英文版）

基　　金：jointly supported by the Stable Supporting Fund of Science and Technology on Underwater Vehicle Technology (No. JCKYS2019604SXJQR-06);the National Natural Science Foundation of China-Marine Science Research Center of Shandong Provincial Government Joint Funding Project (No. U1606401);the National Natural Science Foundation of China (No. 61603108);the Taishan Scholar Project Funding (No. tspd20161007);the National Key Research and Development Plan (Nos. 2016YFC0300704;2017YFC030660)。

摘　　要：The hadal zone(ocean depths of 6 – 11 km) is one of the least-understood habitats on Earth because of its extreme conditions such as high pressure, darkness, and low temperature. With the development of deep-sea vehicles such as China's 7000 m manned submersible Jiaolong, abyssal science has received greater attention. For decades, gravity-piston corers have been widely used to collect loose subsea-sediment long-core samples. However, the weight and length of the gravity sampler cables and the operating environment limit sampling capacity at full ocean depths. Therefore, a new self-floating sediment sampler with a spring-loaded auto-trigger release and that incorporates characteristics from traditional gravity-driven samplers is designed. This study analyzes the process by which a gravity-piston corer penetrates the sediment and the factors that affect it. A formula for obtaining the penetration depth is deduced. A method of optimizing the sampling depth is then developed based on structure design and parametric factor modeling. The parameters considered in the modeling include the sampling depth, balance weight, ultimate stress friction coefficient, dimensions of the sampler, and material properties. Thus, a new deep-sea floating parametric sampler designed based on virtual prototyping is proposed. Accurate values for all the design factors are derived from calculations based on the conservation of energy with penetration depth, analyses of the factors affecting the penetration depth, and analyses of the pressure bar stability. Finally, experimental data are used to verify the penetration-depth function and to provide theoretical guidance for the design of sediment samplers.

关 键 词：full-ocean-depth sampling sediment sampler factor parameter design hadal science 

分 类 号：P716[天文地球—海洋科学]